伽玛暴(Gamma-Ray Burst)笔记。记录有关伽玛暴的新文章,另外也包括看的老文章、自己的想法、以及跟天文相关的一些东西。 Feel free to leave me a message by comments or by email.

星期三, 二月 05, 2014

Veres 2013 能量注入所产生的GeV,TeV辐射

主要内容:
考虑能量注入到反向激波中,或者外激波中,所产生的同步辐射和逆康普顿散射的高能成分。(不知道这里为什么只针对短暴)

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文章信息:

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Title:
Prospects for GeV-TeV detection of short gamma-ray bursts with extended emission
Authors:
Veres, P.; Mészáros, P.
Publication:
eprint arXiv:1312.0590
Publication Date:
12/2013
Origin:
ARXIV
Keywords:
Astrophysics - High Energy Astrophysical Phenomena
Comment:
8 pages, 15 figures, submitted to ApJ
Bibliographic Code:
2013arXiv1312.0590V

Abstract

We discuss the GeV to TeV photon emission of gamma-ray bursts (GRBs) within the refreshed shock and the continuous injection scenarios, motivated by the observation of extended emission in a substantial fraction of short GRBs. In the first model we assume that the central engine emits promptly material with a range of Lorentz factors. When the fastest shell starts to decelerate, it drives a forward shock into the ambient medium and a reverse shock in the ejecta. These shocks are reenergized by the slower and later arriving material. In the second model we assume that there is a continued ejection of material over an extended time, and the continuously arriving new material keeps reenergizing the shocks formed by the preceding shells of ejecta. We calculate the synchrotron and synchrotron self-Compton radiation components for the forward and reverse shocks and find that prospective and current GeV to TeV range instruments such as CTA, HAWC, VERITAS and HESS have a good chance to detect afterglows of short bursts with extended emission, assuming a reasonable response time.

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